Main body of an automatic switch



FIG. 1 is a perspective view of the main body of an automatic switch showing my design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof ; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a main body of an automatic switch, as shown and described. 